2025.07.18 Vitor Cardoso receives Simons Foundation grant for strong gravity research Vitor Cardoso is one of 12 PIs at different institutions, who will receive the support from the Simons Foundation for a collective project on gravity and black hole research. The combined efforts from theoretical…
2025.07.18 Welcome GW231123, the Most Massive Binary Black Hole Observed Through Gravitational Waves Black holes are a mystery, but today we have substantial evidence of their existence. A prolific way to detect them is through gravitational waves—ripples in space and time produced when two black holes merge with each…
2025.07.18 Black holes in comic books! Rodrigo Panosso Macedo has been awarded the Carlsberg Mindelegat outreach grant to launch an entertaining and visually striking science communication project that brings black hole physics to life through comics and…
2025.07.18 Reflections on gravity The Strong group did a three-day retreat in fabulous Fuglsang Herregaard. The retreat consisted on individual reflections, group discussions on the status of our scientific activity and open challenges. We also…
2025.07.03 A more complete expansion for black hole ringdown waveforms Each musical instrument has its own unique sound spectrum. Similarly, a ringing black hole emits gravitational waves with its own characteristic frequencies (or ``quasinormal modes''). Black hole spectroscopy is the…
2025.06.18 City Medal for Vitor Cardoso Vitor was honoured by the city of Póvoa de Varzim, for his outstanding scientific contributions to our understanding of black holes and gravitational waves and the cosmos at large, and his leadership roles in…
2025.06.16 Strong sails like the Vikings On a wind-whipped day, June 14, 2025, in Roskilde, members of the Strong group embarked on an adventure to learn the Viking tradition that is rooted in the land that hosts us.
2025.06.12 Master defense by Matilde Garcia On June 11, 2025 at 11:00 AM in room HB1 at the Niels Bohr Institute, Matilde Garcia will defend her master thesis supervised by Associate Professor Jose Maria Ezquiaga.
2025.06.02 All you wanted to know about black hole spectroscopy Black holes vibrate, like stars, or guitar strings. The "ringdown" radiation emitted by oscillating black holes has great scientific potential.
2025.05.29 Environmental Dynamics in Extreme Mass Ratio Inspirals With the upcoming launch of the LISA mission, scientists will detect gravitational waves at lower frequencies than ever before, and this will bring new data on galactic centres and the monstrous black holes that reside…
A recent study published in Physical Review Letters: 2025.05.28 Cosmic Waltz A recent study published in Physical Review Letters shows that electromagnetic observations of stars
Galaxies 2023 Best Paper Award 2025.05.27 Galaxies Best Paper Award The paper "Key Science Goals for the Next-Generation Event Horizon Telescope” by the ngEHT collaboration, where Vitor Cardoso was Working Group leader and Yifan Chen Topic Leader, was selected as the winner of the…
From September 1, 2025, the new Center of Gravity funded by the Danish National Research Foundation will officially start: 2025.05.22 Center Coordinator retreat 2025 From September 1, 2025, the new Center of Gravity funded by the Danish National Research Foundation will officially start.
Gravitational-wave astronomy will celebrate a decade of existence in 2025: 2025.05.19 The 5th Scandinavian meeting on gravitational-wave science The Scandinavian community has been producing exciting results in the field and met for the 5th Meeting on Gravitational Wave Science in Scandinavia on May 15 and 16 at the University of Copenhagen.
gravitational waves at frequencies above the kilohertz range: 2025.05.07 Boosting high-frequency gravitational wave and ultralight dark matter searches Boosting high-frequency gravitational wave and ultralight dark matter searches
Work by Strong Members: 2025.04.19 Staff Picks on Wolfram Community Work by Strong Members is a Feature by the Staff Picks on Wolfram Community. The work, Forward ray tracing and hot spots in Kerr spacetime, was developed by Lihang Zhou a visiting student at Strong, Zhen Zhong, Yifan…
Gravitational waves: 2025.04.15 Cosmic whispers made LOUD by intervening matter Every few minutes, somewhere in the Universe, a black hole encounters another and starts a fateless ritual around each other until their collision. Through this dance, space and time is excited, producing vibrations…
2025.04.06 Strong field gravity in India Vitor visited colleagues Kothawala, Mishra and Sriramkumar at Chennai and delivered the Chandrasekhar Lecture
Our latest social gathering: 2025.03.21 Photography Competition at STRONG Our latest social gathering uniquely blended science and art with a pre-screening of Gravitating Gestures, a captivating video artwork by Sjoerd Knibbeler, created during his 2024 residency with the Strong Group.
Gravitating Gestures (2025): 2025.03.21 Gravitating Gestures Gravitating Gestures (2025) captures the intimate processes of theoretical discovery, focusing on eleven physicists of the Niels Bohr Institute navigating the abstract planes of black hole physics.
Black holes: 2025.03.19 Galaxies do not affect black hole spectroscopy When a black hole is disturbed, it “rings” like a bell before settling down - a phenomenon known as black hole ringdown. The study of the vibration modes of black holes is called spectroscopy, in analogy with atomic…
PhD defense: 2025.02.09 PhD defense by Daniele Pica, NBI/Perugia On February 20, 2025 at 14.00, in Aud. A. Daniele Pica will defend his PhD thesis supervised by Marta Orselli (University of Perugia) and Troels Harmark (NBI). The thesis defense will be in English.
Master defense: 2025.02.07 Master defense by Miao Shang On Monday January 13, 2025 at 13:15 in room Hb1 at Blegdamsvej, Miao Shang will defend her master thesis supervised by Jose Ezquiaga. Censor will be Marta Orselli (University of Perugia). The thesis defense will be in…
conference on Lensing and Wave optic: 2025.02.06 Strong at Erwin Schrödinger Institute, Vienna From December 9-13, 2024, the gravitational-wave explorers of the Strong group at the Niels Bohr Institute attended a conference on Lensing and Wave optics in Strong gravity at the Erwin Schrödinger Institute in Vienna.